* {
    margin: 0 auto;
}

html {
    max-width: 210mm;
}

body {
    min-height: 100vh;

    display: grid;
    place-items: center;

    background-color: #000;
}

div#logo {
    min-width: 10cm;
    min-height: 10cm;

    background-image: url("var/logo.png");
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    display: grid;
    grid-template-rows: auto auto 1fr auto;
}